Part 7 (2/2)

=T.= Not as above; leaves usually many-lobed. (=U.=)

=U.= Leaves thin; bark of trunk peeling off in thin horizontal strips 83. _Betula._

=U.= Leaves thin; leaf-buds long, slender, sharp-pointed; bark smooth, not peeling; cultivated 90. _f.a.gus._

=U.= Leaves thickish; bark roughish; fruit an oval woody cone, remaining on through the year 84. _Alnus._

=U.= Leaves thick; fruit an acorn 88. _Quercus._

=V.= Leaves evergreen, small, 2-3 in. long, thick, with revolute margins; fruit an acorn 88. _Quercus._

=V.= Leaves evergreen, oval to lance-oval, usually large; small trees, almost shrubs. (=d.=) page 56.

=V.= Leaves deciduous (some are evergreen in the Southern States). (=W.=)

=W.= Plant more or less spiny. (=c.=)

=W.= Plant not at all spiny. (=X.=)

=X.= Leaf-blade thin, long, pointed, with curved parallel veins or ribs 45. _Cornus._

=X.= Leaf-blade thin, circular or broadly oval in outline, with blunt, almost rounded apex; veins not regularly parallel 27. _Rhus._

=X.= Leaf quite elongated, 5 or more times as long as wide.

(=b.=)

=X.= Leaves with none of the above peculiarities. (=Y.=)

=Y.= Deciduous bud-scales (stipules), leaving a scar or mark completely around the stem at the base of the leaves. 1. _Magnolia._

=Y.= Leaves covered on one or both sides with silvery scales 71. _Elaeagnus._

=Y.= No such ring around the stem, or silvery scales on the leaves. (=Z.=)

=Z.= Leaves distinctly straight-veined, thin 90. _f.a.gus._

=Z.= Leaves thick, obtuse; fruit an acorn 88. _Quercus._

=Z.= Leaves 6 in. or more long; crushed leaves with a rank, fetid odor 5. _Asimina._

=Z.= Leaves 3-5 in. long; twigs and leaves very spicy; shrub rather than tree 70. _Lindera._

=Z.= Leaves about 2 in. long, oval, on twigs which have ridges extending down from the sides of the leafstalk; small tree, almost a shrub, with beautiful flowers 43. _Lagerstroemia._

=Z.= Leaves not as above. (=a.=)

=a.= Fruit a large (-1 in.) rounded pulpy berry with a heavy calyx at the base 55. _Diospyros._

<script>